/*
    This file is part of the substandard lisp implementation of Standard Lisp
    Copyright (C) 2011 Nicky Nickell

    substandard lisp is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

(de delete (u v)
  (cond
    ((null v) NIL)
    ((equal (car v) u) (cdr v))
    (T (cons (car v) (delete u (cdr v))))))

/*---
name: delete

doc: |
  explaining what delete is / how it is used!

tests: |
  (delete 1 '(1 2 3 4)) -> (2 3 4)
  (delete 2 '(1 2 3 4)) -> (1 3 4)
  (delete 5 '(1 2 3 4)) -> (1 2 3 4)
...*/
